This example code will read the Google and print its source to the console.

Java Code:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;


public class URLExp {

	public static void main(String[] args) {
		try {
			URL google = new URL("http://www.google.com/");
			URLConnection yc = google.openConnection();
			BufferedReader in = new BufferedReader(new InputStreamReader(yc
					.getInputStream()));
			String inputLine;
			while ((inputLine = in.readLine()) != null) {
				System.out.println(inputLine);

			}
			in.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}